Wednesday, September 28, 2011
When the tide recedes and exposes the shoreline, they can be found in flocks picking among the exposed pea gravel. It took me a long time to solve the mystery of what they found so attractive. For a while, I thought it was the broken bits of submerged aquatic vegetation (SAV). I thought perhaps they needed some greens in their diet. I would see them picking up the stems and appear to be eating them. Then, one day I took a closer look at the SAV. I now think they are attracted to the snails that can be found on grass.